When writing an English-language document, which contains an Arabic name, LibreOffice Writer does not let me mark a text span and declare the selection to be in the Arabic language for purposes of proper rendering, spell-checking etc.
The Arabic language is missing entirely from the list of languages, i.e. there is no entry “Arabic“ between “Apatani” and “Aragonese” under Tools → Language → For Selection → More… → Language
Version info:
LibreOffice Version: 6.2.5.2
Ubuntu Linux
AMD64